Like atlasman said, check your set-up to make sure you're tuned properly. If you're not, then you're setting yourself up for trouble which can manifest itself in any number of ways--like not getting pass-thru's. I switched to Muzzy's last year after reading all the positive threads about them. This year, using them, I have had 3 of my 4 deer go 45 yards and the fourth made it about 75 yards. Two of the shots were pass-thru's, but shot placement had a lot to do with the other two not making it all the way through.